Question

why is H2S is less acidic than H2Te?

Answer 1

becoz te is more electronegative then s

Answer 2

H2S is less acidic than H2Te because as we move down the group,the bond dissociation enthalpy decreases i.e it becomes easy to dissociate or break the bonds(due to the increasing size down the group).So,with this concept in terms of hydrides,it becomes easy for H2Te to remove H easy as H+ because of its low bond dissociation enthalpy(as mentioned before).Therefore , H2Te is more acidic.


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